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Microchip Technology 1N5228BE3
- Part No.:
- 1N5228BE3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5228BE3.pdf
- Description:
- DIODE ZENER 3.9V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,485
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Product details
Overview
1N5228BE3 from Microsemi is a 3.9 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 23 Ω dynamic impedance at IZT, used for precision voltage regulation in low-power analog reference and bias circuits.
For engineers reviewing the 1N5228BE3 datasheet, 1N5228BE3 pinout, 1N5228BE3 application, or 1N5228BE3 equivalent, this part serves as a JEDEC-registered, RoHS-compliant, temperature-stable voltage reference with minimal capacitance and radiation-hardened construction suitable for industrial and aerospace environments.
Technical Context
The 1N5228BE3 operates as a reverse-biased Zener regulator with a nominal breakdown voltage of 3.9 V at 20 mA, exhibiting a temperature coefficient of −0.060 %/°C and dynamic impedance of 23 Ω at IZT. It maintains stable regulation across −65°C to +175°C operating temperature range.
Its DO-35 glass package provides hermetic sealing, ESD insensitivity per MIL-STD-750 Method 1020, and thermal resistance of 250 °C/W junction-to-lead (3/8″ lead length), enabling reliable operation in high-reliability analog signal conditioning and power supply feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V at 20 mA test current - defines precise regulation point for reference design |
| Zener Tolerance | ±5% (B suffix) - ensures predictable voltage accuracy without post-selection |
| Power Dissipation | 500 mW at 25°C - supports continuous regulation in compact PCB layouts with derating above 50°C |
| Zener Impedance | 23 Ω at IZT - limits output voltage variation under load current changes |
| Temp. Coefficient | −0.060 %/°C - enables stable reference over wide ambient temperature swings |
| Max Reverse Current | 50 μA at 1.0 V - confirms low leakage below knee voltage for standby efficiency |
| Forward Voltage | ≤1.5 V at 200 mA - allows safe forward conduction during transient polarity reversal |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower potential node in reverse-bias regulation |
| Cathode | Banded end | Connected to regulated voltage node; must be held positive relative to anode for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N5228B | Guarantees full six-parameter electrical specification compliance per industry standard |
| Radiation-hardened construction | Inherent hardness per MicroNote 050 supports use in space-grade and nuclear instrumentation |
| Low capacitance | Typical <2 pF - preserves high-frequency signal integrity in RF bias and timing circuits |
| ESD-insensitive | No handling precautions required per MIL-STD-750 Method 1020 - simplifies manufacturing flow |
| RoHS-compliant (e3) | Meets EU Directive 2011/65/EU with annealed matte-tin plating - qualifies for green product programs |
Applications
| Reference Voltage Source | Power Supply Feedback |
|---|---|
Use Scenario: Providing stable 3.9 V reference for ADC/DAC biasing and op-amp level-shifting in sensor signal chains. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed voltage reference independent of supply variation. Use Value: ±5% tolerance and −0.060 %/°C tempco ensure ≤±7.5 mV drift over −40°C to +85°C, meeting 12-bit converter accuracy requirements. | Use Scenario: Setting output voltage in linear regulator feedback loop (e.g., LM317-based adjustable supply). IC Role / Device Role / Timing Role: Precision voltage clamp defining regulation threshold via resistor divider network. Use Value: 23 Ω dynamic impedance minimizes output voltage error under load transients, improving line/load regulation by up to 0.5%. |
| Overvoltage Protection Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting I/O pins of microcontrollers or FPGAs against ESD-induced voltage spikes. IC Role / Device Role / Timing Role: Shunt clamping device conducting excess energy to ground when input exceeds 3.9 V. Use Value: 500 mW rating sustains 100 ms surge events per IEC 61000-4-2 Level 4, while low capacitance avoids signal distortion. | Use Scenario: Generating clean reset pulse during power-up and brown-out conditions for embedded processors. IC Role / Device Role / Timing Role: Threshold detector triggering external reset IC or pull-up network when VCC drops below 3.9 V. Use Value: Tight −0.060 %/°C tempco ensures reset threshold remains within ±20 mV over full industrial temperature range, preventing spurious resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Same 3.9 V nominal, ±5% tolerance, but 1 W power rating in DO-41 package; higher thermal mass and larger footprint | Preferred where higher surge energy absorption or extended derating margin is required | Select 1N4728A only if board layout accommodates DO-41 and system demands >500 mW dissipation capability |
| MMBZ5228BS | SOT-23 surface-mount variant; same 3.9 V/±5%/500 mW specs but 3-pin configuration with cathode/anode/NC pinout | Used in space-constrained PCBs requiring automated placement and reflow compatibility | Choose MMBZ5228BS when transitioning from through-hole to SMT assembly or when board real estate is limited |
Compared with 1N4728A and MMBZ5228BS, the 1N5228BE3 offers optimal balance of JEDEC registration, radiation hardness, and axial-lead mechanical robustness for legacy industrial designs-making it preferred for high-reliability through-hole applications where DO-35 mounting and proven field history are critical.
Availability
1N5228BE3 is available at Aetrix Electronics and suitable for voltage reference generation, power supply feedback networks, overvoltage protection clamps, and microcontroller reset circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N5228BE3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5228BE3 belongs to Microsemi's legacy 1N52xxB Zener series designed for precision voltage regulation in mission-critical systems where stability, longevity, and environmental resilience are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5228BE3?
The 1N5228BE3 has a nominal Zener voltage of 3.9 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix per JEDEC specification. This tolerance applies at 20 mA test current and 25°C ambient temperature, and is validated across the full −65°C to +175°C operating range per Microsemi's characterization data.
Is the 1N5228BE3 RoHS compliant and what does the "e3" suffix signify?
Yes, the 1N5228BE3 is RoHS compliant, and the "e3" suffix explicitly denotes annealed matte-tin plating per EU Directive 2011/65/EU. This finish meets MIL-STD-750 Method 2026 for solderability and replaces traditional tin-lead plating without compromising reliability or thermal performance in reflow or wave soldering processes.
What is the maximum power dissipation and thermal derating behavior of the 1N5228BE3?
The 1N5228BE3 is rated for 500 mW at 25°C, with linear derating to zero at 175°C. Its thermal resistance is 250 °C/W junction-to-lead (measured at 3/8″ lead length) and 310 °C/W junction-to-ambient on FR4 board. Derating follows Figure 1 in the Microsemi datasheet, reducing power by 3.33 mW/°C above 50°C ambient.
Does the 1N5228BE3 have radiation-hardened properties and documentation to support that claim?
Yes, the 1N5228BE3 exhibits inherent radiation hardness per MicroNote 050, a publicly available Microsemi technical note confirming total ionizing dose (TID) resilience without additional screening. This property stems from its DO-35 glass package and silicon process, making it suitable for low-earth orbit and nuclear instrumentation applications without requiring JAN/JANTX-level qualification.
How does the temperature coefficient of the 1N5228BE3 affect its performance in wide-temperature applications?
The 1N5228BE3 has a temperature coefficient of −0.060 %/°C, meaning its Zener voltage decreases by approximately 2.34 mV per °C rise from 25°C. Over −40°C to +125°C, this results in a total shift of about ±90 mV - well within acceptable bounds for 12-bit analog systems and industrial control references where absolute accuracy is secondary to stability and repeatability.
1N5228BE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bag
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5228BE3 FAQ
1.How can I place an order for 1N5228BE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5228BE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5228BE3 reliable?
The price and inventory of 1N5228BE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5228BE3 is usually 5 days.
3.What payment methods are accepted for 1N5228BE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5228BE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5228BE3?
1N5228BE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5228BE3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5228BE3?
For technical support, including 1N5228BE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5228BE3 requirements.
6.How does Aetrix verify that 1N5228BE3 is sourced from the original manufacturer or authorized distributors?
All 1N5228BE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5228BE3 meets industry standards.
7.What is the process for return or replacement of 1N5228BE3?
All 1N5228BE3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5228BE3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5228BE3 part is unused and in its original packaging.
Return procedure for 1N5228BE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5228BE3 Tags
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